Process and agent for delustering textile materials



Patented Feb. 12, 1935 PATENT OFFICE PROCESS AND AGENT FOR DELUSTERING TEXTILE MATERIALS Herbert Genael, Cologne-Mulheim, and Rudolf Bauer, Cologne-Dents, General Aniline Works,

Germany, assignorl to Inc., New York, N. Y., a

corporation of Delaware No Drawing. Application August 24, 1933, Serial No. 686,656. In Germany September 20, 1932 Claims.

Process and agents for delustering textile materials.

The present invention relates to a process and preparations for delustering, or rendering mat,

5 textile materials, such as textile fibres, as for example those from viscose silk, cuprammonium silk, cellulose acetate silk, natural silk or linen, and fabrics containing one or more of the said fibres, either wholly or locally by fixing on the said materials a water-insoluble aluminium salt of an aromatic o-dicarboxylic acid.

The process may be carried out, for example, by treating the fibres or the fabrics containing the same with a solution of a water-soluble aluminium salt and, simultaneously or subsequently, with a solution of a salt of an aromatic o-dicarboxylic acid. Preferably, the process is carried out with an aqueous solution and with watersoluble salts of aluminium and of the aromatic o-dicarboxylic acids. Since several aluminium salts of the said nature, especially aluminium salts of the lower fatty acids, such as formic and acetic acids, are difiicultly obtained in the dry state, mixtures of aluminium salts with alkali salts, that is alkali metal or ammonium salts, may be employed which react in the presence of water with the said aluminium salts to form the salts of aluminium and the acid originally combined with alkali, such as formic and acetic acids. If desired the acidity of the mixtures may be reduced by adding small quantities of alkali as for example sodium or potassium carbonates or bicarbonates, caustic soda or ammonium carbonate.

A particularly simple method of carrying out the process according to the present invention consists in dissolving a mixture of the water-' soluble salts in water and passing the materials to be delustered through the said solution, the goods being warmed in the solution or being subsequently steamed. The material is slowly warmed in the solution to say from about to about 100 C., slightly lower temperatures, such as down to about 45 being suflicient if the acidity of the solutions has been reduced by the addition of alkali. If a warming be carried out by subsequent steaming the acidity should not be reduce however.

Aluminium salts suitable for carrying out the process according to the present invention are the water-soluble salt as for example aluminium sulfate, chloride, acetate or formate. Suitable salts of aromatic o-dicarboxylic acids are, for example, the alkali metal and ammonium salts of phthalic acid dichlor, tetrachlor, a and ,B-nitro,

hydroxy and amino phthalic acids; in most cases aromatic di-carboxylic acids containing no or neutral substituents are preferred as they are more easily available and are less liable to give by-reactions than hydroxy or amino di-carboxylic acids. The aluminium and o-dicarboxylic acid salts are usually employed in about stoichiometrical quantities. Mixtures of the aluminium and phthalic salts may consist for example of aluminium sulphate and sodium phthalate or of aluminium sulphate, sodium acetate and sodium tetrachlor phthalate.

After the goods are wholly or partially impregnated with the solution chosen, water insoluble aluminium salts of the dicarboxylic acid chosen are precipitated on the goods by the warming operation. The heating may be carried out during the treatment with the aforesaid solutions, provided the whole surface of the material in question is to be delustered. A partial or local impregnation of the fabrics, for, example by printing or padding a paste containing the aforesaid salts and a thickening agent as is used in printing with dyestuif pastes and subsequent steaming allows of obtaining valuable damask effects.

The particular advantage obtainable by the present process consists in that the materials delustered according to the present invention are fast to washing and to dyeing with substantive dyestufl's that the substances precipitated on the fibres are not rubbed off and do not form dust, and that the process according to the present invention may be carried out in a single bath.

The following examples will further illustrate how the present invention may be carried out in practice, but the invention is not restricted thereto.

Example 1' Stockings from viscose silk are worked for about 15 minutes at room temperature in from 20 to 30 times their weight of a solution, containing per litre of water 5.8 grams of the sodium salt of tetrachlor-phthalic acid and 17 cubic centimeters of a solution of basic aluminium formate containing 50 grams of aluminium oxide and a few cubic centimeters of acetic acid per litre of water, whereupon the temperature is raised to about C. and the stockings are worked at this tem perature for from 15 to 30 minutes. The stockings are then shortly rinsed with cold water and dried at from 50 to C. The delustering effect obtained is fast to dyeing with substantive dyestufis and to washing with soap.

Example 2 Linen piece goods are worked for 15 minutes at room temperature with about 20 times their weight of a solution, containing per litre of water 3.5 grams of phthalic sodium salt and 17 cubic centimeters of a solution of aluminium formate, containing per litre 50 grams oi aluminium oxide and about 0.5 gram of citric acid, whereupon the temperature is raised to about C. and the goods are worked at this temperature for from 15 to 30 minutes. The goods are then shortly rinsed with cold water and dried. The delustering eifect obtained is fast to dyeing with substantive dyestuflsand to washing with soap.

Example 3 Piece goods from viscose silk are passed through a cold solution, in one litre of water, of 28 grams of phthalic sodium salt, 44.4 grams of crystalline aluminium sulphate and 10.9 grams of anhydrous sodium acetate. The solution is then squeezed oil and the goods are steamed (at about C.) for from about 15 to 30 minutes whereupon they are passed through cold water and dried. The delustering eilect obtained is fast to'dyeing and to washing with soap.

Example 4 skeins of cellulose acetate silk are worked for about 10 minutes at room temperature with a solution, in one litre of water, of 9.3 grams of the sodium salt of dichlor phthalic acid, 34 cubic centimeters of a solution of basic aluminium formate, containing per litre 50 grams of aluminium oxide and a little acetic acid, whereupon the temperature is raised to about 60 C. and the skeins are worked for some time at this temperature. The skeins are then shortly rinsed with cold water and dried. The delustering effect obtained is fast to washing with soap.

Example 5 obtained on the lustrous fabric, the mat eflectsbeing fast to washing and on the viscose satin, fast to dyeing with substantive dyestuffs.

We claim:

1. The process for delustering lustrous textile materials which comprises fixing a water-insoluble aluminium salt of an aromatic o-dicarboxylic acid at least on a portion of the said materials.

2. The process for delustering lustrous textile materials which comprises passing the said materials through a bath containing a water-soluble salt of aluminium and a water-soluble salt of an aromatic o-dicarboxylic acid and at least subsequently warming the impregnated materials.

3. The process for delustering lustrous textile materials which comprises printing the said materials with a printing paste containing a watersoluble salt of aluminium and a water-soluble salt of an aromatic o-dicarboxylic acid and then steaming the printed materials.

4. In the process as claimed in claim 1, the employment of an aluminium salt of an aromatic o-dicarboxylic acid, containing a neutral substituent.

5. A preparation for carrying out the process according to claim 1 comprising a water soluble salt of aluminium and a water soluble salt of an aromatic o-dicarboxylic acid.

6. A preparation for carrying out the process according to claim 1 comprising a water-soluble salt of aluminium and a water-soluble salt of an aromatic o-dicarboxylic acid containing a neutral substituent.

'7. A preparation for carrying out the process according to claim 1 comprising a water-soluble salt of aluminium and a water-soluble salt of phthalic acid.

8. A preparation for carrying out the process according to claim 1 comprising a water-soluble, inorganic salt of aluminium, an alkali metal acetate and a water soluble salt of an aromatic o-dicarboxylic acid.

9. A preparation for carrying out the process according to claim 1 comprising about stoichiometrical quantities of a water-soluble salt of aluminium and of an alkali metal phthalate.

10. A preparation for carrying out the process according to claim 1 comprising about stoichiometrical quantities or a water-soluble salt of aluminium and of an alkali metal chlor-phthalate.

HERBERT GENSEL. RUDOLF BAUER. 

